Abstract: use common sense of orifice meter scale information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Flow meter of throttling device type refers to using orifice, nozzle, venturi tube measure full pipe flow system of measurement. The system by the throttle device commonly, differential pressure gauge and the data processor ( Prescribing integrator or computer) Composition. This kind of flow measurement system. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the use of orifice meter scale common sense article details. Flow meter of throttling device type refers to using orifice, nozzle, venturi tube measure full pipe flow system of measurement. The system by the throttle device commonly, differential pressure gauge and the data processor ( Prescribing integrator or computer) Composition. The characteristics of the flow measurement system is: 1 the principle and theory research are very mature; Standardization degree is higher, 2 GB / 2624 and ISO5167 standard file; Used 3 simple structure, low cost and maintenance cost is low; 4 adaptable to the environment; 5 if the maintenance and management right can get higher measurement accuracy. These features are unmatched by other forms of flowmeter, thus throttling in the flow measurement device type flow meter has a high proportion, estimated at around 80%. In recent years, although there are some new kind of flow meter on the market, however, because of the structure, cost and conditions of use, still can't shake the throttle device type flow meter in the position in the flow measurement. So proper use and maintenance of this kind of measurement system is still one of automation instrument professionals must pay attention to problems. A flow measurement system maintenance, the throttle device using the status quo of the throttle device in the currently used the flow measurement system, due to limited by maintenance personnel professional technology level, most limited to management and maintenance of hardware. Hardware management and maintenance of the main content is to check the throttle device leaks jam pulse pressure pipe cutting guide door, differential pressure gauge and the data processor work correctly and to check on a regular basis. If the above maintenance inspection found no problems, even if the system displays the data is an obvious deviation, also decided that commonly system is normal. Because for many years engaged in the management of the flow measurement, I think the use of the flow measurement system of the throttle device maintenance, only for the management and maintenance of hardware is not enough, more important is to make a soft maintenance of the system. The so-called soft maintenance, is the flow measurement system of the throttle device operation condition parameters of trace analysis calculation, according to the calculation results to modify the technical parameters of system. Software maintenance is a make the system parameters close to the actual operation process. Second, the necessity of soft maintenance for any set of throttling device type flow measurement system, its design and calculation is based on the buyer to provide medium types, temperature, pressure, flow rate, pipe condition parameters, such as geometric size calculation. Which is based on a set of the buyer to provide the parameter calculation of design and manufacture a throttling device, only the set of the throttle device adopted in design and calculation of working conditions, system to guarantee the uncertainty of measurement within the prescribed scope. If the actual operating conditions deviate from the design conditions, the system measurement data will not be able to ensure the uncertainty within the prescribed scope. The flow measurement system and the actual use of the throttle device much more different from design conditions, some even six to one. So must be soft to maintain, but this kind of soft during the process of maintenance should be used throughout the system. Three, use deviation of system operation condition and design conditions the influence of uncertainty of 1. Actual operation flow value deviates from the value of the design operation flow deviates from the value of the design flow, it is often appear problem. In most cases, the design discharge of high value, actual operation flow value is low. Will effect the uncertainty of the system reason mainly is: ( 1) Uncertainty because of the throttle device is calculated according to the commonly used traffic, common flow is generally scale flow of about 70 ~ 80%, if deviating from the common flow far, flow coefficient C can cause larger changes, will increase the uncertainty. （ 2) The uncertainty of differential pressure gauge is to be calculated by reference error. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.
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